Question

Petromyzon is a connecting link between
A) Balanoglossus and Amphioxus
B) Amphioxus and cyclostoma
C) Cyclostoma and pisces
D) Pisces and amphibians

Answer 1

● Petromyzon is a connecting link between cyclostomes and Pisces.

● Sea lampreys scientifically called Petromyzon marinus are cyclostomes, the most basal surviving gathering of vertebrates.

● These are thought to have existed to a great extent unaltered for in excess of 500 million years.

● These are parasitic organisms which are Habitat to Northern hemisphere.

Answer 2

Petromyzon is a connecting link between  Cyclostoma and pisces

Option C  

Explanation:

• Petromyzon is an aquatic species of the members of family Petromyzontidae.

• Its member of phylum chordata. It’s a connecting link between two classes of chordata.

• The cyclostomata is a class of chordates that comprises of the jawless fishes that are true parasites.

• They are called lamprey and scientific name is Petromyzon sp.

• The pieces on the other hand are vertebrate fishes that do have well developed jaws and are member of superclass gnathostomata.

• The connecting link has characteristics of both the groups that they are connecting.  

Learn more about Petromyzon

Write five important differences between myxine and petromyzon.

https://brainly.in/question/7153819

Give characteristics of petromyzon. Comment on its mode of nutrition.

https://brainly.in/question/11797477